alt Hacker NewsVery nice, thanks for sharing! Maybe show which upper or lower values are included in the intervals? A notation I am familiar with uses outward facing brackets if the value is not included in the interval. That always applies to infinity.
Applied to the cases here:
]-∞, -1] U [0.5, +∞[
The excluded interval in between becomes ]-1, 0.5[ then.
That’s how min (and analogously max) works, right? min(A, B) = [lo(A,B), lo (hi(A), hi(B))].
Edit: idea: copy a formula from the results section to the input field if the user clicks/taps on it.
Replies
It's possible to support that but it makes the code very very much more complicated. I've decided early on to not support it. Would be a cool addition though!
I was also a bit confused by this. I thought the standard notation was round brackets, but maybe doesn't work well in ASCII?
From reading the linked paper[0], It explains closed interval only. "An interval union is a set of closed and disjoint intervals where the bounds of the extreme interval can be ±∞".
[0]: https://www.ime.usp.br/~montanhe/unions.pdf